Research On Structure Design And Application Of Fast Repulsion Mechanism

Power system in our country is toward lager capacity and power grid development of large-scale,unified whole,this is for grid power quality put forward higher request Circuit break as the main open circuit equipment in the power grid,The action time,the breaking capacity and reliability is becoming more and more important. But the traditional actuator difficult to meet these requirements. Now a novel combination of fast repulsion mechanism having a permanent magnet to keep the action fast, simple structure, intelligent control advantages is considered. However, the current research in this area is less systematic. In this thesis, from theory to calculate the dynamic process of rapid opening repulsion mechanism, advantages and disadvantages of the three algorithms, and finally come to meet the finite element analysis simulation of this article. Permanent magnet repulsion combined mechanism to maintain rapid structural impact on performance is critical, the use of Solidworks software to maintain permanent magnet permanent magnet repulsion combined mechanism quick and fast repulsion holding means opening mechanism were model design. Using Ansoft software to maintain a permanent magnet permanent magnet repulsion combined mechanism quick and fast repulsion holding means opening mechanism finite element simulation analysis, analysis of the main structural parameters, such as the opening mechanism comprises two coils, opening mechanism consists of a coil repulsion plate composed of coil turns, the impact of pre-charge voltage and other factors on opening repulsion.In the simulation, based on a fast zero-forcing mechanism repulsion DC breaking technology in the application of the DC circuit breaker in the process of breaking, zero-forcing, the need to disconnect the circuit breaker in a very short period of time and the rated opening distance, rapid application design repulsion switch prototype experiment results show that the fast repulsion switch opening operation fast, reliable, fast open contacts of contacts burning light.